// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/android/context_utils.h"

#include <jni.h>

#include "base/android/scoped_java_ref.h"
#include "base/lazy_instance.h"
#include "jni/ContextUtils_jni.h"

using base::android::JavaRef;

namespace base {
namespace android {

    namespace {

        // Leak the global app context, as it is used from a non-joinable worker thread
        // that may still be running at shutdown. There is no harm in doing this.
        base::LazyInstance<base::android::ScopedJavaGlobalRef<jobject>>::Leaky
            g_application_context
            = LAZY_INSTANCE_INITIALIZER;

        void SetNativeApplicationContext(JNIEnv* env, const JavaRef<jobject>& context)
        {
            if (env->IsSameObject(g_application_context.Get().obj(), context.obj())) {
                // It's safe to set the context more than once if it's the same context.
                return;
            }
            DCHECK(g_application_context.Get().is_null());
            g_application_context.Get().Reset(context);
        }

    } // namespace

    jobject GetApplicationContext()
    {
        DCHECK(!g_application_context.Get().is_null());
        return g_application_context.Get().obj();
    }

    static void InitNativeSideApplicationContext(
        JNIEnv* env,
        const JavaParamRef<jclass>& clazz,
        const JavaParamRef<jobject>& context)
    {
        SetNativeApplicationContext(env, context);
    }

    bool RegisterContextUtils(JNIEnv* env)
    {
        return RegisterNativesImpl(env);
    }

} // namespace android
} // namespace base
